A contract is a legally enforceable agreement between two or more parties with mutual obligations. The remedy at law for breach of contract is "damages" or monetary compensation. In equity, the remedy can be specific performance of the contract or an injunction. Both remedies award the damaged party the "benefit of the bargain" or expectation damages, which are greater than mere reliance damages, as in promissory estoppel. Origin and scope

Contract law is based on the principle expressed in the Latin phrase pacta sunt servanda, which is usually translated "agreements to be kept" but more literally means "pacts must be kept".[1] Contract law can be classified, as is habitual in civil law systems, as part of a general law of obligations, along with tort, unjust enrichment, and restitution. As a means of economic ordering, contract relies on the notion of consensual exchange and has been extensively discussed in broader economic, sociological, and anthropological terms (see "Contractual theory" below). In American English, the term extends beyond the legal meaning to encompass a broader category of agreements.[2] This article mainly concerns the common law. Such jurisdictions usually retain a high degree of freedom of contract, with parties largely at liberty to set their own terms. This is in contrast to the civil law, which typically applies certain overarching principles to disputes arising out of contract, as in the French Civil Code. However, contract is a form of economic ordering common throughout the world, and different rules apply in jurisdictions applying civil law (derived from Roman law principles), Islamic law, socialist legal systems, and customary or local law. Elements

At common law, the elements of a contract are mutual assent and consideration. Mutual assentAt common law, mutual assent is typically reached through offer and acceptance, that is, when an offer is met with an acceptance that is unqualified and that does not vary the offer's terms. The latter requirement is known as the "mirror image" rule. If a purported acceptance does vary the terms of an offer, it is not an acceptance but a counteroffer and, therefore, simultaneously a rejection of the original offer. The Uniform Commercial Code notably disposes of the mirror image rule in § 2-207, although the UCC only governs transactions in goods. Offer and acceptance

Main article: Offer and acceptanceThe most important feature of a contract is that one party makes an offer for an arrangement that another accepts. This can be called a concurrence of wills or consensus ad idem (meeting of the minds) of two or more parties. The concept is somewhat contested. The obvious objection is that a court cannot read minds and the existence or otherwise of agreement is judged objectively, with only limited room for questioning subjective intention: see Smith v. Hughes.[3] Richard Austen-Baker has suggested that the perpetuation of the idea of 'meeting of minds' may come from a misunderstanding of the Latin term 'consensus ad idem', which actually means 'agreement to the [same] thing'.[4] There must be evidence that the parties had each from an objective perspective engaged in conduct manifesting their assent, and a contract will be formed when the parties have met such a requirement.[5] An objective perspective means that it is only necessary that somebody gives the impression of offering or accepting contractual terms in the eyes of a reasonable person, not that they actually did want to form a contract. The case of Carlill v Carbolic Smoke Ball Company is an example of a 'unilateral contract'. Obligations are only imposed upon one party upon acceptance by performance of a condition [disambiguation needed]. In the United States, the general rule is that in "case of doubt, an offer is interpreted as inviting the offeree to accept either by promising to perform what the offer requests or by rendering the performance, as the offeree chooses."[6] Offer and...